add better args system:

Makefile

@@ -16,8 +16,15 @@ $(BINARY): $(OBJ) Makefile tcc/libtcc1.a
 run: $(BINARY)
 	./$(BINARY) run example.lisp
 
+run-debug: $(BINARY)
+	./$(BINARY) run example.lisp -d yes
+
 run-build: $(BINARY)
-	./$(BINARY) build example.lisp example
+	./$(BINARY) build example.lisp -o example
+	./example
+
+run-build-debug: $(BINARY)
+	./$(BINARY) build example.lisp -o example -d yes
 	./example
 
 tcc/libtcc1.a:

README.md

@@ -15,5 +15,5 @@ to run the example run `make run`, or to compile another file run either
 ```
 or 
 ```
-./compiler build filename.lisp binaryname
+./compiler build filename.lisp -o outputname
 ```

example.lisp

@@ -5,4 +5,3 @@
 (printf "5 + (100 / 5) = %d\n" 
     (add 5 
         (divide 100 5)))
-

include/args.h

@@ -0,0 +1,13 @@
+#ifndef __ARGS_H__
+#define __ARGS_H__
+
+typedef struct Args {
+    const char* input;
+    const char* output;
+    int build;
+    int comp_debug;
+} Args;
+
+Args parse_args(int argc, char** argv);
+
+#endif

include/binary.h

@@ -1,4 +1,4 @@
-#include <helpers.h>
+#include <args.h>
 
 #ifndef __BINARY_H__
 #define __BINARY_H__

include/helpers.h

@@ -1,13 +1,6 @@
 #ifndef __HELPERS_H__
 #define __HELPERS_H__
 
-typedef struct Args {
-    const char* input;
-    const char* output;
-    int build;
-} Args;
-
 char* gen_ident(int indent);
-Args parse_args(int argc, char* argv[]);
 
 #endif

include/slibs

@@ -1 +1 @@
-Subproject commit b0b09f6fd9efd5367dbac19629caf0d027e657e2
+Subproject commit 986006449d1586d9ae55e5696015aa67b0e33f4f

src/args.c

@@ -0,0 +1,48 @@
+#include <args.h>
+#include <string.h>
+#include <assert.h>
+
+char* arg_proceeding(int argc, char** argv, char* arg, char* default_return) {
+    for(int i = 0; i < argc - 1; i++) {
+        if(strcmp(argv[i], arg) == 0) {
+            return argv[i + 1];
+        }
+    }
+
+    return default_return;
+}
+
+char* find_flagless_arg(int argc, char** argv, char* default_return) {
+    for(int i = 1; i < argc; i++) {
+        if(argv[i - 1][0] != '-' && argv[i][0] != '-') {
+            return argv[i];
+        }
+    }
+
+    return default_return;
+}
+
+void skip_args(int* argc, char*** argv, int n) {
+    *argc -= n;
+    *argv += n;
+}
+
+Args parse_args(int argc, char** argv) {
+    assert(argc > 1);
+    skip_args(&argc, &argv, 1);
+    Args args = { 0 };
+
+    if(argc == 1) {
+        args.input = argv[0];
+    } else {
+        if(strcmp(argv[0], "build") == 0) {
+            args.build = 1;
+            args.output = arg_proceeding(argc, argv, "-o", "a.out");
+        }
+
+        args.input = find_flagless_arg(argc, argv, NULL);
+        args.comp_debug = arg_proceeding(argc, argv, "-d", NULL) != NULL;
+    }
+
+    return args;
+}

src/binary.c

@@ -18,7 +18,10 @@ int binary_produce(const char* code, Args args) {
     assert(tcc_compile_string(state, code)                      == 0);
 
     if(args.build) {
-        return tcc_output_file(state, args.output);
+        int ret = -1;
+        ret = tcc_output_file(state, args.output);
+        if(args.comp_debug) printf("Produced binary %s\n", args.output);
+        return ret;
     } else {
         return tcc_run(state, 0, NULL);
     }

src/helpers.c

@@ -1,26 +1,10 @@
 #include <helpers.h>
 #include <string.h>
 #include <stdlib.h>
-#include <assert.h>
 
 char* gen_ident(int indent) {
     char* text = malloc(sizeof(char) * (indent + 1));
     memset(text, ' ', indent);
     text[indent] = '\0';
     return text;
-}
-
-Args parse_args(int argc, char* argv[]) {
-    assert(argc > 2);
-    int build = 0;
-    if(strcmp(argv[1], "build") == 0) {
-        build = 1;
-        assert(argc > 3 && "Build needs an input and output filename.");
-    } else assert(strcmp(argv[1], "run") == 0 && "You must specify to either build or run.");
-
-    return (Args){ 
-        .input = argv[2], 
-        .output = build ? argv[3] : NULL, 
-        .build = build
-    };
 }

src/main.c

@@ -5,28 +5,30 @@
 #include <ast.h>
 #include <codegen.h>
 #include <binary.h>
-#include <helpers.h>
+#include <args.h>
 
 int main(int argc, char* argv[]) {
     Args args = parse_args(argc, argv);
 
-    sl_string buffer = { 0 };
+    sl_string* input_str = sl_read_file(args.input);
-    sl_read_file(args.input, &buffer);
+    if(!input_str) return -1;
+    char* input = sl_c_str(*input_str);
 
-    printf("Tokens:\n");
+    int debug = args.comp_debug;
+    if(debug) printf("Tokens:\n");
     TokenVec tokens = { 0 };
-    tokenize(sl_c_str(buffer), &tokens);
+    tokenize(input, &tokens);
-    tokens_print(tokens);
+    if(debug) tokens_print(tokens);
-    printf("\n");
+    if(debug)  printf("\n");
 
-    printf("AST:\n");
+    if(debug) printf("AST:\n");
     ASTNode* program = ast_parse(&tokens);
-    ast_print(program, 0);
+    if(debug) ast_print(program, 0);
-    printf("\n");
+    if(debug) printf("\n");
 
-    printf("Codegen:\n");
+    if(debug) printf("Codegen:\n");
     const char* code = codegen(program);
-    printf("%s\n\n", code);
+    if(debug) printf("%s\n\n", code);
 
     binary_produce(code, args);